Expansion-coil for refrigerating systems



APPLICATION FILED JAN. 5, I918.

Patented Sept. 14, 1920.

WITNESSES:

A TTORNEY.

UNITED ST 'EwJENQT -1,f

CLARENCE ivn HoLLnYnNn FLOYD W. ROBISON, or nnrnornfivrronrenn,'ASSIGNORS T UTILITY coivrransson COMPANY, or DETROIT, ivrrcrrrenrt, ACORPORATION MICHIGAN.

EXPANSION-COIL FOR REFRIGERATING SYSTEMS: 1

Specification of Letters Patent. Patefittedspt;

Application filed January 5,'.1918. Serial No. 210,435.;

T 0 all whom it may concern Be it known that i we, 'CLARHENCE HOLLEY andFLOYD W. RoBIsoN, citizens of the United States, residing at Detroit,county of lVayne, State of Michigan, have invented a certain new anduseful Improvement 1n Expansion-Coilsfor Refrigerating Systems,

and declare the following to be a full, clear,

and exact description of the same,'such as will enable others skilled inthe artto which it pertains td make and use the-same, refer ence beinghad to the accompanying drawings, which form a part of thisspecification.

This invention relates to expansion coils for artificialrefrigeratingsystems, and its primary object is to provide a. unit construction forcoils of such characterwhereby a coil of any desired capacity may bebuilt up for use with refrigerator boxes of varyingcapacity by simplysecuring together as many units as may be required in a manner tooperate as a continuous coil. Another object of the invention is toprovide a unitfor the construction of a composite coil of several units,each unit being formed of a coiled tube so arranged that the inlet andoutlet are on opposite sides, and when assembled with other units,positioned respectively adjacent the ends of the contiguous units withthe inlet of one unit connected withthe outlet of the other by a U bend.By this arrangement, the several units are formed in one continuouscoil, having an inlet and an outlet at opposite ends-adapted forconnection with the supply and return pipes of the expansion system,means being provided for fixedly holding the coils in a stack. Theseobjects and the several novel features of the invention are hereinaftermore fully described and claimed and shown in'the accompanying drawingsin which--' turns 1, 3 and 5 being spaced a distance apart sufficient toallow the returnbent portion 6 and 7 to be inserted therebetween, thecoil being formed in an S bend as indicated at 8 centrally oftheycoihThe coils, as-is well known, carry'the expanding fluid ,(as 1 ethylchlorid orsulfur dioxid), which enters the tube 1 at thelend- 2 andisdischarged therefrom at the end 9after having V made the circuit ofthe coil as described;

These unit coils are to be connected in a stack one over the other asindicated inrFig. 2 1n whlch the coil. a is connected with the .coil 6which in turn is connected with a 'With the other to form a continuouscoil for circulation of the expanding fluid.

With the coils superimposed as stated, a retainer 11 is used betweeneach coiland having the arms 12, 13 and 14E on opposite ends asindicated in Fig. 1 adapted to receive the securing bolts 15 passingthrough the ends of the arms. By means of the nuts 16 the coils arefixedly held in position and the assembled sections ofthe coil may behandled as a unit. U bends 10 connect the discharge end of one coil withthe inlet end of the other coil as will be readily understood and aresweated into place providing a fluid tight joint.

' It is'ei 'ident from the above-description that a coil of any desiredcapacity may be formed by assembling the desired number of units a, b,or 0, and by formation of the coilin flat form as described andconnected.

together in the manner stated, a coil comparatively inexpensiveincharacter is.provided without necessity of revision of form for coilsofvarious'sizes and a uniform and standard construction is secured bythe described arra-ngement'in units.

Having thus briefly described our invention, what we claim and desire tosecure by Letters Patent of the United States isj 1. An expansion coiLfor artificial refrigcrating systems comprising a series of unitsconnected together to form a continuous coil,

each unit consisting of a return-coiled tube, the coil beingformed bybendingof the tube in the desired form to the centercand the returncoils being positioned between each of the first turns whereby, inadjacent turns of the coil, fluid flows in opposite directions, I

the ends of the completed coil terminating j on adjacent sides thereofandbeing connected 'With the adjacent ends tiguous coils. r

2. An expansion coil for artificial refrigerating systems consisting ofa series of units connected together to form a v continuous coil, eachunit consisting of a return fiatof the concoiled tube, the ends thereofterminating on adjacent sides of the coil and each end being connectedwith the adjacent end of a conerating systems consisting of a series ofunits connected together to forma continuous coil, each unit consistingof a return fiatcoiled tube, each end thereof being connectedrespectively p with the ends of a. contiguous coil on opposite sides,the two terminal coils an outlet at the other, and

of: the series being adapted for connection wlth the supply and returnpipesof the expansionsystem. j 4. An expansion coil for artificialrefrig erating systems consisting of a series of units connectedtogether to form a continuous coil with the ends thereof adapted forconnection respectively 'Withthe supply and return pipes of the system,each unit consisting of a return flat-coiled tube, the ends thereofterminating on adjacent sides of the coil and each end being connectedrespectively with the adjacent end of the contiguous'coil :on oppositesides, and a spacer member extending between each unit, the'spacermembers adapted to be secured together to bindingly engage the saidunits.

'.In testimony whereof We sign this specification.

CLARENCEMQHOLLEYQ FLOYD W. ROBISON.

